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-rw-r--r--ext/zlib/zlib.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 34a425a844..ffde50ba0b 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -34,6 +34,18 @@
#include "ext/standard/php_string.h"
#include "php_zlib.h"
+/*
+ * zlib include files can define the following preprocessor defines which rename
+ * the corresponding PHP functions to gzopen64, gzseek64 and gztell64 and thereby
+ * breaking some software, most notably PEAR's Archive_Tar, which halts execution
+ * without error message on gzip compressed archivesa.
+ *
+ * This only seems to happen on 32bit systems with large file support.
+ */
+#undef gzopen
+#undef gzseek
+#undef gztell
+
ZEND_DECLARE_MODULE_GLOBALS(zlib);
/* {{{ Memory management wrappers */